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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '136430f99ac1cfe611e4d79a551c68d9c41d2a4b3a7172944e1b362ab8d48bdd' 
  AND token = 'pqzq3QUUNEtywl2QZzphJZ/6ZASL1nAWow+dM1v3M6U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}